<!DOCTYPE html>
<html lang="en">
<script src="lib/vue.js"></script>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id ="app">
    {{name}}
    </div>
    <script>
        // let 定义变量   const 定义的变量为常量
        
        let vue =new new Vue({
            el:"#app",
            data:{
                name :"aaa"
            }
        })
    </script>
</body>

</html>